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ID2Pattern: How Payment Risk Models Pretrain on High-Cardinality Identity Fields Without Exploding Vocabulary

Payment risk agents face a vocabulary explosion problem. Every new card, device fingerprint, or account ID expands the embedding table. Traditional categorical encoding approaches either maintain a growing lookup table or hash identities into fixed buckets, losing behavioral signal in the process.…

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  1. 2026-11-02 10:06 · DEV Community — Machine Learning
    ID2Pattern: How Payment Risk Models Pretrain on High-Cardinality Identity Fields Without Exploding Vocabulary

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